Abstract
In his review of recent methods for the esterification and protection of carboxy groups, Haslam notes that a great need still exists for a versatile and simple process whereby esters may be formed under mild conditions.2 It is appropriate, therefore, that we should disclose a straightforward and economical procedure which we have been using for the esterification of labile poly-function natural products, e. g. gibberellins and penicillins, and the preparation of allylic esters of dihydro-aromatic acids.